432 MR. MAIIXIN JACOBY ON NEW SPECIES [NoV. 28, 



Elytra blue or black, ivithout inarkinys, 



Oedionychis subcostata, sp. n. 



Metallic blue, the head and thorax reddish-fulvous, the latter 

 finely punctate ; elytra dark blue, rather opaque, closely and 

 strongly rugose- punctate, with a single, very obsolete costa near 

 the sides. 



Length 7 millim. 



Head impunctate, reddish-fulvous ; frontal elevations strongly 

 raised, transverse, carina linear, very convex ; antennae with the 

 lower two joints fulvous, the following four black, the rest Avanting, 

 third joint shorter than the foui'th ; thorax transversely convex, 

 about twice as broad as long, the sides broadly flattened, rounded 

 in front, the anterior angles produced outwards into a small 

 tooth, the disc with a rather distinct transverse groove near the 

 base, minutely punctured when seen under a strong lens ; scutel- 

 lum black ; elytra dark blue, rugosely punctured throughout, a 

 slightly raised narrow line extends from within the shoulders to 

 below the middle ; under side and legs dark metallic blue, smooth 

 and shining. 



Hab. Brazil. 



Oedionychis motschulskyi, sp. n. 



Head at the vertex, the antennae (the apical joints excepted), 

 the under side, and the tibiae and tarsi black ; thorax and femoi-a 

 flavous ; elytra metallic violaceous, finely and closely punctured. 



Length 5 millim. 



Head e tirely impunctate, black, shining ; the eyes widely 

 separated ; frontal elevations transverse, very strongly raised ; 

 clypeus triangular, flavous as well as the labi'um ; antennae slender, 

 extending to the middle of the elytra, black, the apical three joints 

 fulvous, third and fourth joints equal ; thorax nearly three times 

 broader than long, flavous, the sides rounded, deeply sulcate, the 

 anterior angles very slightly produced ou.twards into a blunt tooth, 

 the surface entirely impunctate, obsoletely transversely sulcate 

 near the base ; scutellum black ; elytra with a feeble impression 

 below the base, convex, nearly parallel, veiy narrowly margined, 

 finely and very closely punctured, metallic violaceous blue ; legs 

 flavous, the breast, abdomen, the apex of the posterior femora, and 

 the tibiae and tarsi black. 



Hab. Peru. 



The colour of the head, antennse, and legs, and the rather narrow 

 parallel shape of this species sepai'ate it from those of neai-ly 

 similar coloration. 



Oedionychis indigosoma, sp. n. 



Head and thorax fulvous, nearly impunctate ; elytra dai-k blue, 

 closely and strongly semirugose punctate ; below and the legs 

 bluish black. 



Lenfith 7 millim. 



